Modelagem do crescimento e da produção em plantios de Pinus taeda L. na região Centro- Sul do Paraná

Abstract

This study aimed to make the adjustment of mathematical models using data obtained by scaling trees and periodic inventories to generate the equations that best represent the growth and future production of the plantations of a company located in the south central region of Parana . The database is made up of pine plantations taeda with initial spacing of 3.0 x 2.0 meters deployed in the year 1996. Initially it was used as initial parameters data from forest inventory carried out by the company in 214.30 hectares. Grouped into site classes by the model of Schumacher and the method of curved guide in each region stratification was held in diameter classes by Sturges method for selecting the trees sampled for scaling. Diameters were measured at the base and 1.30 m above the ground, and in sections on 15%, 25%, 35%, 45%, 55%, 65%, 75%, 85% and 95% of its total height . Models were adjusted for obtaining heights and volumes, and these data were used to carry out the modeling of the growth and yield by adjusting the mathematical models available in the literature for modeling settlement level. The adjustment of the models was performed evaluating the adjusted coefficient of determination and standard error of estimate, plus waste distribution graphs. The Clutter production model was the most suitable for obtaining estimates of the volume and basal area, providing consistent values of statistical and biological point of view; Production tables with thinning simulation showed the model of growth potential and production Clutter for thinned.